Abstract “All-out defense"is a type of the people participating warfare preparation, which is to defense force for a center, whole people guard for a key, the establishment of national defense for a foundation and the whole country people guard territory together, protect national's security. For a country to say,“security"has been set to the first site. This viewpoint has more showed the importance of all-out defense education. At the present,“media operation, psychology operation, law operation"of the mainland China attacking has been conformed to what called a strategy guide principle of“loss less, efficiency high, attack fast, decision rapidly."Under the threat of the mainland China and development of world trend, we should popularize all-out defense education. The research briefly describes a concept of all-out defense, and analyses the importance of all-out defense education by the approach of national security. Furthermore,according to the development of all-out defense education between Taiwan and Mainland proceed to compare and study, and discuss to the content of all-out defense education precisely, and think and strengthen the method of implement and direction in future about all-out defense education. Through a thinking pattern of“as enemy as a teacher", our citizens can value education of defense, and make soldiers in military and feelings of the citizenry combine. Therefore, our nation will be more rich and strong.